Right now, it is only possible to add a bulleted list with one indentation. If you attempt to push "Tab" to increase the bullet indent, it will skip ahead to the next text section.
For example...
In StoryMaps...
- You can only...
- ...have one indented bullet.
This would be useful for people who are using story maps as a simple data guide for layer lists, or anyone who wants wants diverse formatting for their text.